USC is going to have to rely heavily on the golden arm of quarterback Matt Barkley after an injury to running back Silas Redd followed an injury to Curtis McNeal. While McNeal has been able to return to the game, Redd's availability is still up in the air.

For Redd, this was truly a case of adding insult to injury, as he fumbled on the play that caused what appeared to be a left-shoulder injury.

InsideUSC tweeted this update to give us a clue on the nature of the injury: